You can embed YouTube and Vimeo videos directly into your comments and posts on itch.io. In order to do this, just paste the link of the video into a new line in the text field, then hit enter. The URL will be swapped out with an embed to the video.
This also works for Sketchfab embeds. Just link to a model on Sketchfab and hit enter to replace it with the embed.
If you have any ideas for other integrations post them here!